31030100122103 has 4 divisors (see below), whose sum is σ = 31030174462320. Its totient is φ = 31030025781888.

The previous prime is 31030100122093. The next prime is 31030100122127. The reversal of 31030100122103 is 30122100103013.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 31030100122103 - 2²⁸ = 31029831686647 is a prime.

It is a super-2 number, since 2×31030100122103² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31030100122303) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36540443 + ... + 37379996.

It is an arithmetic number, because the mean of its divisors is an integer number (7757543615580).

Almost surely, 2^{31030100122103} is an apocalyptic number.

31030100122103 is a deficient number, since it is larger than the sum of its proper divisors (74340217).

31030100122103 is an equidigital number, since it uses as much as digits as its factorization.

31030100122103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74340216.

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 31030100122103 its reverse (30122100103013), we get a palindrome (61152200225116).

The spelling of 31030100122103 in words is "thirty-one trillion, thirty billion, one hundred million, one hundred twenty-two thousand, one hundred three".